What absorbs at 1720 cm⁻¹ in an FTIR spectrum?
A band near 1720 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Možná přiřazení funkčních skupin
| Funkční skupina | Podpůrná fakta | Citované zdroje | Nejvyšší spolehlivost |
|---|---|---|---|
| Carbonyl (C=O) | 48 | 44 | 1,0 |
| Carboxyl (COOH) | 8 | 7 | 0,9 |
| Ester | 6 | 5 | 0,9 |
| Amide | 5 | 5 | 0,9 |
| Urethane | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 0,9 |
| Imide | 2 | 2 | 0,9 |
| Acetyl | 1 | 1 | 0,9 |
| Oxalate | 1 | 1 | 0,9 |
| Aldehyde (CHO) | 1 | 1 | 0,9 |
| Carbohydrate | 1 | 1 | 0,9 |
| C-O single bond | 1 | 1 | 0,8 |
| Methyl | 1 | 1 | 0,7 |
| C=n | 1 | 1 | 0,6 |
Pořadí odráží nahromaděné literární důkazy, nikoli jediné autoritativní pravidlo. Vždy potvrďte v kontextu vašeho vzorku.
Literatura za těmito přiřazeními
-
Carbonyl (C=O) spolehlivost 1,0
“Explicit assignment: 'C=O has been shown to be related to the group'”
Ai 等 - 2011 - Fabrication of Coated-Collagen Electrospun PHBV Na DOI: 10.1155/2011/123724 -
Carbonyl (C=O) spolehlivost 1,0
“explicit assignment”
Krol 等 - 2021 - Polyurethane cationomers containing fluorinated so DOI: 10.1007/s00396-021-04819-4 -
Carbonyl (C=O) spolehlivost 1,0
“Explicit assignment in text: 'peaks of carbonyl groups (1720 cm-1)'”
Muhonja 等 - 2018 - Biodegradability of polyethylene by bacteria and f DOI: 10.1371/journal.pone.0198446 -
Carbonyl (C=O) spolehlivost 0,95
“Explicit assignment in text: 'high intense peak at 1720.50 cm-1 corresponding to ester carbonyl (C=O) stretching vibration'.”
Maity 等 - 2017 - Polyhydroxyalkanoates production by Zobellella spe DOI: 10.22438/jeb/38/6/MRN-533 -
Carbonyl (C=O) spolehlivost 0,95
“Text: 'new peaks on OSA starches spectrum at 1720 cm-1 due to C=O'”
Zainal 等 - 2018 - Effect of octenylsuccinylation on physicochemical, DOI: 10.1016/j.foodhyd.2017.09.003 -
Carbonyl (C=O) spolehlivost 0,95
“Explicit assignment: 'ester carbonyl band (1720 cm-1)'”
Bhaskara 等 - 2014 - Attachment of beta-Cyclodextrins on Cotton and Inf DOI: 10.14504/ajr.1.3.4 -
Carbonyl (C=O) spolehlivost 0,95
“Explicit assignment: absorption peaks of C=O at 1720 cm-1”
Chen 等 - 2023 - Interpenetration Networked Polyimide-Epoxy Copolym DOI: 10.3390/polym15010243 -
spolehlivost 0,95
“Explicit assignment: '1720cm-1 at is the C=O stretching vibration in carboxylic acids, formate esters, aldehydes and ketones'”
Zhang 等 - 2019 - Secondary organic aerosol formation from OH-initia DOI: 10.5194/acp-19-15007-2019
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